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A364481 The number of stones-and-bones tilings of the (3n+1,3n+1)-benzel when one orientation of bone is forbidden. 6
4, 224, 168960, 1705639936, 229940737867776, 413561647491497066496, 9918120959299139713735065600 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
See Problem 9 of the Propp article. It is conjectured that a(n) is 2-adically continuous as a function of n.
LINKS
James Propp, Trimer covers in the triangular grid: twenty mostly open problems, arXiv:2206.06472 [math.CO], 2022.
CROSSREFS
Sequence in context: A227822 A052209 A211610 * A042539 A182484 A159281
KEYWORD
nonn,more
AUTHOR
James Propp, Jul 26 2023
STATUS
approved

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Last modified June 23 20:17 EDT 2024. Contains 373653 sequences. (Running on oeis4.)